I am new to ruby and I am trying to create a hangman game, to do so I need to create a new game each time the user click on a button.
First step is to create the same object each time the methode create will be called (it will be different because of the .sample.
I am trying to create an object with the initialize method in my model.rbfile.
Here is my code :
class Game < ApplicationRecord
has_many :guesses
attr_accessor :word_to_guess, :health_bar, :game_status
def initialize
#word_to_guess = words.sample
#health_bar = 5
#game_status = game_status[0]
end
words = [
"spokesperson", "firefighter", "headquarters", "confession", "difficulty", "attachment", "mechanical",
"accumulation", "hypothesis", "systematic", "attraction", "distribute", "dependence", "environment",
"jurisdiction", "demonstrator", "constitution", "constraint", "consumption", "presidency", "incredible",
"miscarriage", "foundation", "photography", "constituency", "experienced", "background", "obligation",
"diplomatic", "discrimination", "entertainment", "grandmother", "girlfriend", "conversation", "convulsion",
"constellation", "leadership", "insistence", "projection", "transparent", "researcher", "reasonable","continental",
"excavation", "opposition", "interactive", "pedestrian", "announcement", "charismatic", "strikebreaker",
"resolution", "professional", "commemorate", "disability", "collection", "cooperation", "embarrassment",
"contradiction", "unpleasant", "retirement", "conscience", "satisfaction", "acquaintance", "expression",
"difference", "unfortunate", "accountant", "information", "fastidious", "conglomerate", "shareholder",
"accessible", "advertising", "battlefield", "laboratory", "manufacturer", "acquisition", "operational",
"expenditure", "fashionable", "allocation", "complication", "censorship", "population", "withdrawal",
"sensitivity", "exaggerate", "transmission", "philosophy", "memorandum", "superintendent", "responsibility",
"extraterrestrial", "hypothesize", "ghostwriter", "representative", "rehabilitation", "disappointment",
"understanding", "supplementary", "preoccupation"
]
game_status = ["Game not started yet", "In Game", "You win", "You loose"]
end
When I do a Game.newin my console, it returns this error message :
"ArgumentError: wrong number of arguments (given 1, expected 0)
"
I dont understand, what argument am I giving ?
This error comes from ActiveRecord internals (some inheritance magic) - it expects the model's initializer to accept parameters while your one doesn't. Another issue - you don't call super in the redefined initializer which might cause other issues too. If you inherit from some class and need to customize its initializer it is always a good idea to call super first...
To summarize, something like
def initialize(*) # <- fix nr. 1, we accept arbitrary number of params and don't care about them
super # <- fix nr. 2
#word_to_guess = words.sample
#health_bar = 5
#game_status = game_status[0]
end
should hopefully fix the issue...
Related
Basically i am having very simple test where i check if account_id from Grant (so id of his parent) is equal to account_id of Role model.
Test seems ok, but i need to refactor it to use subject/let and to use FactoryGirl and i can't do that even with all the info on this subject i found.
So, test is fine i just need help with refactoring.
It's first time for me working with rails and writing test on it, so i am forced to ask this type of question here.
describe "validations" do
it "should have equal account_id" do
first_acc, second_acc = Account.new, Account.new
first_acc.id, second_acc.id = 10, 11
vlada_role, vlada_grant = Role.new, Grant.new
vlada_role1, vlada_grant1 = Role.new, Grant.new
vlada_role.account_id = first_acc.id
vlada_grant.account_id = second_acc.id
vlada_role.id, vlada_grant.id = 8000, 255
rg = RoleGrant.new
rg1 = RoleGrant.new
rg.role, rg1.role = vlada_role, vlada_role1
rg.grant, rg1.grant = vlada_grant, vlada_grant1
expect(rg.role.account_id).not_to eql(rg.grant.account_id)
expect(rg1.role.account_id).to eql(rg1.grant.account_id)
end
end
I'm new to ruby so please excuse any ignorance I may bear. I was wondering how to parse a JSON reponse for every value belonging to a specific key. The response is in the format,
[
{
"id": 10008,
"name": "vpop-fms-inventory-ws-client",
"msr": [
{
"key": "blocker_violations",
"val": 0,
"frmt_val": "0"
},
]
},
{
"id": 10422,
"name": "websample Maven Webapp",
"msr": [
{
"key": "blocker_violations",
"val": 0,
"frmt_val": "0"
}...
There's some other entries in the response, but for the sake of not having a huge block of code, I've shortened it.The code I've written is:
require 'uri'
require 'net/http'
require 'JSON'
url = URI({my url})
http = Net::HTTP.new(url.host, url.port)
request = Net::HTTP::Get.new(url)
request["cache-control"] = 'no-cache'
request["postman-token"] = '69430784-307c-ea1f-a488-a96cdc39e504'
response = http.request(request)
parsed = response.read_body
h = JSON.parse(parsed)
num = h["msr"].find {|h1| h1['key']=='blocker_violations'}['val']
I am essentially looking for the val for each blocker violation (the json reponse contains hundreds of entries, so im expecting hundreds of blocker values). I had hoped num would contain an array of all the 'val's. If you have any insight in this, it would be of great help!
EDIT! I'm getting a console output of
scheduler caught exception:
no implicit conversion of String into Integer
C:/dashing/test_board/jobs/issue_types.rb:20:in `[]'
C:/dashing/test_board/jobs/issue_types.rb:20:in `block (2 levels) in <top (requi
red)>'
C:/dashing/test_board/jobs/issue_types.rb:20:in `select'
I suspect that might have too much to do with the question, but some help is appreciated!
You need to do 2 things. Firstly, you're being returned an array and you're only interested in a subset of the elements. This is a common pattern that is solved by a filter, or select in Ruby. Secondly, the condition by which you wish to select these elements also depends on the values of another array, which you need to filter using a different technique. You could attempt it like this:
res = [
{
"id": 10008,
"name": "vpop-fms-inventory-ws-client",
"msr": [
{
"key": "blocker_violations",
"val": 123,
"frmt_val": "0"
}
]
},
{
"id": 10008,
"name": "vpop-fms-inventory-ws-client",
"msr": [
{
"key": "safe",
"val": 0,
"frmt_val": "0"
}
]
}
]
# define a lambda function that we will use later on to filter out the blocker violations
violation = -> (h) { h[:key] == 'blocker_violations' }
# Select only those objects who contain any msr with a key of blocker_violations
violations = res.select {|h1| h1[:msr].any? &violation }
# Which msr value should we take? Here I just take the first.
values = violations.map {|v| v[:msr].first[:val] }
The problem you may have with this code is that msr is an array. So theoretically, you could end up with 2 objects in msr, one that is a blocker violation and one that is not. You have to decide how you handle that. In my example, I include it if it has a single blocker violation through the use of any?. However, you may wish to only include them if all msr objects are blocker violations. You can do this via the all? method.
The second problem you then face is, which value to return? If there are multiple blocker violations in the msr object, which value do you choose? I just took the first one - but this might not work for you.
Depending on your requirements, my example might work or you might need to adapt it.
Also, if you've never come across the lambda syntax before, you can read more about it here
Given this array in Ruby:
myarray = [name: "John", age: 35]
How do I refer to the age?
I tried myarray[:age] but got an error can't convert Symbol into Integer
Update:
I was trying to simplify my question by extracting what I thought my problem is. I may not understand completely.
I'm experimenting with Dashing and trying to send a number to a meter widget. I've created a variable, 'response_raw' and am trying to send it in the third send event. Here's my code:
SCHEDULER.every '1m', :first_in => 0 do
# Get checks
url = "https://#{CGI::escape user}:#{CGI::escape password}#api.pingdom.com/api/2.0/checks"
`enter code here`response = RestClient.get(url, {"App-Key" => api_key})
response = JSON.parse(response.body, :symbolize_names => true)
if response[:checks]
checks = response[:checks].map { |check|
if check[:status] == 'up'
state = 'up'
last_response_time = "#{check[:lastresponsetime]}ms"
response_raw = check[:lastresponsetime]
else
state = 'down'
last_response_time = "DOWN"
response_raw = 0
end
{ name: check[:name], state: state, lastRepsonseTime: last_response_time, pt: response_raw }
}
else
checks = [name: "pingdom", state: "down", lastRepsonseTime: "-", pt: 0]
end
checks.sort_by { |check| check['name'] }
send_event('pingdom', { checks: checks })
send_event('pingdom-meter', { value: checks[:pt] })
end
In CoffeeScript [name: "John", age: 35] is an array containing single object with two properties (name and age).
Here is how it'll look in plain JavaScript:
myarray = [
{
name: "John",
age: 35
}
];
So, answering your question, to access an age you should take the first element of an array and then reference an age property:
myarray[0].age
or
myarray[0]['age']
But, judging from your question, your're probably using wrong data structure. Why don't you want to use a plain object instead of an array?
person = name: "John", age: 35
console.log "#{person.name}'s age is #{person.age}"
Update
It looks like your question is actually about Ruby and not about CoffeeScript. Though, my answer will remain the same.
To access an age you should take the first element of an array and then reference an age property:
myarray[0][:age]
Since myarray is an array, Ruby expects an integer index, but you're giving it symbol :age instead.
I finally figured it out with Leonid's help. Thank you.
I changed:
send_event('pingdom-meter', { value: checks[:pt] })
to
send_event('pingdom-meter', { value: checks[0][:pt] })
Ruby 1.9.1 + ActiveRecord 2.3.5 + Postgres 8.3.7
Here is a rough sketch of my code. Ignore any obvious syntax details left out. The model below inherits from ActiveRecord::Base connected to a Postgres 8.3.7 database via ActiveRecord 2.3.5.
class TableA
has_many :tableB
end
class TableB
belongs_to :tableA
has_many :tableC
end
class TableC
belongs_to :tableB
has_many :tableD
end
class TableD
belongs_to :tableC
has_many :tableE
end
class TableE
belongs_to :tableD
end
# Note that tableA has fids that are referenced in tableE but is not part of this model
#
# Later in the script, in the same global scope, I want to add entries to these tables if
# I cannot find what I need. Bear in mind that this part betrays much Ruby noobiness.
toAdd.each do |widget|
add_tableA = TableA.find_by_sql().first # assumes I will get one back based on earlier sanity checks
add_tableB = TableB.find_by_sql().first
if (add_tableB == nil)
new_tableB = TableB.new( # value assignments )
new_tableB.save
add_tableB = TableB.find_by_sql().first
end
add_tableC = TableC.find_by_sql().first
if (add_tableC == nil)
new_tableC = TableC.new( # value assignments )
new_tableC.save
add_tableC = TableC.find_by_sql().first
end
add_tableD = TableD.find_by_sql().first
if (add_tableD == nil)
new_tableD = TableD.new( # value assignments )
new_tableD.save
add_tableD = TableD.find_by_sql().first
end
# I step into TableA again because items in TableE are linked to items in TableA, but they are
# distinct from the "high level" item I grabbed from TableA earlier.
add_tableA = TableA.find_by_sql().first
if (add_tableA == nil)
new_tableA = TableA.new( # value assignments )
new_tableA.save
add_tableA = TableA.find_by_sql().first
end
# Now that I have a TableA id to put into TableE, just create TableE row because I know this
# does not exist yet.
new_tableE = TableE.new( # value assignments ) # again, this is assumed to be new based on earlier checks
new_tableE.save
end
What always happens is I get the following stack trace:
/...gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract_adapter.rb:219:in `rescue in log': PGError: no connection to the server (ActiveRecord::StatementInvalid)
: ROLLBACK
from .../gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract_adapter.rb:202:in `log'
from .../gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/connection_adapters/postgresql_adapter.rb:550:in `execute'
from .../gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/connection_adapters/postgresql_adapter.rb:576:in `rollback_db_transaction'
from .../gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/database_statements.rb:143:in `rescue in transaction'
from .../gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/database_statements.rb:125:in `transaction'
from .../gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/transactions.rb:182:in `transaction'
from .../gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/transactions.rb:200:in `block in save_with_transactions!'
from .../gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/transactions.rb:208:in `rollback_active_record_state!'
from .../gems/activerecord-2.3.5/lib/active_record/transactions.rb:200:in `save_with_transactions!'
.... regardless if I'm calling save, save!, or doing a create instead of new and save.
strace reveals that I can only get one BEGIN..INSERT..COMMIT transaction to work for each run of this. Any subsequent attempts to INSERT within a transaction either in the same run of the loop or the next one ends with the connection being dropped before a COMMIT is sent. Clearly, I'm doing something wrong here with how I'm stepping into the ActiveRecord model.
I see the following strace only just before the first successful INSERT statement is set up. Is there something in ActiveRecord that allows me to preserve this as I step through tables, or am I simply Doing It Wrong?
rt_sigaction(SIGPIPE, {0x1, [], SA_RESTORER|SA_RESTART, 0x3876c0eb10}, {0x4b2ff0, [], SA_RESTORER|SA_RESTART, 0x3876c0eb10}, 8) = 0
sendto(3, "Q\0\0\2e SELECT attr.attna"..., 614, 0, NULL, 0) = 614
rt_sigaction(SIGPIPE, {0x4b2ff0, [], SA_RESTORER|SA_RESTART, 0x3876c0eb10}, {0x1, [], SA_RESTORER|SA_RESTART, 0x3876c0eb10}, 8) = 0
poll([{fd=3, events=POLLIN|POLLERR}], 1, -1) = 1 ([{fd=3, revents=POLLIN}])
recvfrom(3, "T\0\0\0:\0\2attname\0\0\0\4\341\0\2\0\0\0\23\0#\377\377\377\377\0"..., 16384, 0, NULL, NULL) = 541
Any help here is greatly appreciated.
Thanks everyone. I apologize for taking anyone's time in trying to fix this. This instance of postgres depends upon a second process to run to handle pushing trigger events out to other processes. That process was not running, so the database server booted after the first committed INSERT. It's a custom in-house kind of thing.
I'm working with the Koala gem and the Facebook Graph API, and I want to break down the results I get for a users feed into separate variables for inserting into a mySQL database, probably using Active Record. Here is the code I have so far:
#token = Service.where(:provider => 'facebook', :user_id => session[:user_id]).first.token
#graph = Koala::Facebook::GraphAPI.new(#token)
#feeds = params[:page] ? #graph.get_page(params[:page]) : #graph.get_connections("me", "home")
And here is what #feeds looks like:
[{"id"=>"1519989351_1799856285747", "from"=>{"name"=>"April Daggett Swayne", "id"=>"1519989351"},
"picture"=>"http://photos-d.ak.fbcdn.net/hphotos-ak-ash4/270060_1799856805760_1519989351_31482916_3866652_s.jpg",
"link"=>"http://www.facebook.com/photo.php?fbid=1799856805760&set=a.1493877356465.2064294.1519989351&type=1", "name"=>"Mobile Uploads",
"icon"=>"http://static.ak.fbcdn.net/rsrc.php/v1/yx/r/og8V99JVf8G.gif", "type"=>"photo", "object_id"=>"1799856805760", "application"=>{"name"=>"Facebook for Android",
"id"=>"350685531728"}, "created_time"=>"2011-07-03T03:14:04+0000", "updated_time"=>"2011-07-03T03:14:04+0000"}, {"id"=>"2733058_10100271380562998", "from"=>{"name"=>"Joshua Ramirez",
"id"=>"2733058"}, "message"=>"Just posted a photo",
"picture"=>"http://platform.ak.fbcdn.net/www/app_full_proxy.php?app=124024574287414&v=1&size=z&cksum=228788edbab39cb34861aecd197ff458&src=http%3A%2F%2Fimages.instagram.com%2Fmedia%2F2011%2F07%2F02%2F2ad9768378cf405fad404b63bf5e2053_7.jpg",
"link"=>"http://instagr.am/p/G1tp8/", "name"=>"jtrainexpress's photo", "caption"=>"instagr.am",
"icon"=>"http://photos-e.ak.fbcdn.net/photos-ak-snc1/v27562/10/124024574287414/app_2_124024574287414_6936.gif", "actions"=>[{"name"=>"Comment",
"link"=>"http://www.facebook.com/2733058/posts/10100271380562998"}, {"name"=>"Like", "link"=>"http://www.facebook.com/2733058/posts/10100271380562998"}], "type"=>"link",
"application"=>{"name"=>"Instagram", "id"=>"124024574287414"}, "created_time"=>"2011-07-03T02:07:37+0000", "updated_time"=>"2011-07-03T02:07:37+0000"},
{"id"=>"588368718_10150230423643719", "from"=>{"name"=>"Eric Bailey", "id"=>"588368718"}, "link"=>"http://www.facebook.com/pages/Martis-Camp/105474549513998", "name"=>"Martis Camp",
"caption"=>"Eric checked in at Martis Camp.", "description"=>"Rockin the pool", "icon"=>"http://www.facebook.com/images/icons/place.png", "actions"=>[{"name"=>"Comment",
"link"=>"http://www.facebook.com/588368718/posts/10150230423643719"}, {"name"=>"Like", "link"=>"http://www.facebook.com/588368718/posts/10150230423643719"}],
"place"=>{"id"=>"105474549513998", "name"=>"Martis Camp", "location"=>{"city"=>"Truckee", "state"=>"CA", "country"=>"United States", "latitude"=>39.282813917575,
"longitude"=>-120.16736760768}}, "type"=>"checkin", "application"=>{"name"=>"Facebook for iPhone", "id"=>"6628568379"}, "created_time"=>"2011-07-03T01:58:32+0000",
"updated_time"=>"2011-07-03T01:58:32+0000", "likes"=>{"data"=>[{"name"=>"Mike Janes", "id"=>"725535294"}], "count"=>1}}]
I have looked around for clues on this, and haven't found it yet (but I'm still working on my stackoverflow-foo). Any help would be greatly appreciated.
That isn't a Ruby Hash, that's a fragment of a JSON string. First you need to decode into a Ruby data structure:
# If your JSON string is in json...
h = ActiveSupport::JSON.decode(json) # Or your favorite JSON decoder.
Now you'll have a Hash in h so you can access it like any other Hash:
array = h['data']
puts array[0]['id']
# prints out 1111111111_0000000000000
puts array[0]['from']['name']
# prints Jane Done